A166PXXS8DZF2 – Galaxy A16 5G firmware

Build A166PXXS8DZF2 is a security update for the Galaxy A16 5G (SM-A166P) on Android 16 (One UI 8). It first appeared on Samsung's servers on Jun 17, 2026 (method) and has reached 26 regions so far. It raises the bootloader bit from 7 to 8: once installed, the device no longer accepts firmware with bit 7 or lower, so a downgrade to A166PXXU7DZE2 is blocked. Samsung still serves this file.

Model
SM-A166P
Android
Android 16
Type
Security
Bootloader bit
8
First released
Jun 17, 2026
Regions
26

Rollout timeline by region

The date each region code (CSC) first received A166PXXS8DZF2, counted from the first release.

CSCRegionReleasedRolloutVersion (PDA/CSC/MODEM)
GLBPhilippines (Globe)Jun 17, 2026day 0A166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
THLThailandJun 17, 2026day 0A166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XMEMalaysiaJun 17, 2026day 0A166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XTCPhilippinesJun 17, 2026day 0A166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XXVVietnamJun 17, 2026day 0A166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XIDIndonesiaJun 21, 2026+4 daysA166PXXS8DZF2/A166POLE8DZF2/A166PXXS8DZF2
MM1Singapore (M1)Jun 21, 2026+4 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
SINSingapore (Singtel)Jun 21, 2026+4 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
STHSingapore (StarHub)Jun 21, 2026+4 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XNZNew ZealandJun 21, 2026+4 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XSPSingaporeJun 21, 2026+4 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
ACRGhanaJun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
AFRAfricaJun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
DKRSenegalJun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
ECTNigeriaJun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
XFASouth AfricaJun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
XFVSouth Africa (Vodacom)Jun 21, 2026+4 daysA166PXXS8DZF2/A166POJM8DZF2/A166PXXS8DZF2
OPSAustralia (Optus)Jun 23, 2026+6 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
TELAustralia (Telstra)Jun 23, 2026+6 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
VAUAustralia (Vodafone)Jun 23, 2026+6 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
XSAAustraliaJun 23, 2026+6 daysA166PXXS8DZF2/A166POLM8DZF2/A166PXXS8DZF2
BKDBangladeshJun 30, 2026+13 daysA166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2
BNGBelgiumJun 30, 2026+13 daysA166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2
INSIndiaJun 30, 2026+13 daysA166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2
NPBNepalJun 30, 2026+13 daysA166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2
SLKSri LankaJun 30, 2026+13 daysA166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2

Download and release notes

samloader download -m SM-A166P -r INS -v A166PXXS8DZF2/A166PODM8DZF2/A166PXXS8DZF2

Samsung's release notes and security patch level for this update: SM-A166P / INS on doc.samsungmobile.com. What each part of the build number means: decode A166PXXS8DZF2.